Remove the author flag

Many thanks to Ted and Alex for starting this project
Now, many more people are authors too and the ownership
can be seen in github already.

Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "sccache"
 version = "0.4.0-pre.5"
-authors = ["Ted Mielczarek <ted@mielczarek.org>", "Alex Crichton <alex@alexcrichton.com>"]
 license = "Apache-2.0"
 description = "Sccache is a ccache-like tool. It is used as a compiler wrapper and avoids compilation when possible, storing a cache in a remote storage using the S3 API."
 repository = "https://github.com/mozilla/sccache/"